README.md

Cell Division - a self mutating smart contract

Deployed contract on Goerli : 0xE29ff6DA321397d10819DD9579dbcdcf817fF862

Runtime bytecode (30 bytes):

0x68601e8060093d393df35952383d59396009380160173d828234f050f0ff

Cell-Division.evm

# ▇ => ▇ + ▇
# Minimal runtime bytecode for a contract that mutates 
# into two child contracts and then self-destructs
# 1st child contract receives the call value
# 2nd child contract recevies the remaining balance
# author: Saw-mon and Natalie

# constructor payload for the spawned contract
 
#       ┏━━━━━━━━━━━━━━━━━━━ push1 RUNTIME_BYTECODE_LEN         # L
#       ┃   ┏━━━━━━━━━━━━━━━ dup1                               # L L
#       ┃   ┃ ┏━━━━━━━━━━━━━ push1 RUNTIME_BYTECODE_OFFSET      # O L L
#       ┃   ┃ ┃   ┏━━━━━━━━━ returndatasize                     # 0 O L L
#       ┃   ┃ ┃   ┃ ┏━━━━━━━ codecopy                           # L
#       ┃   ┃ ┃   ┃ ┃ ┏━━━━━ returndatasize                     # 0 L
#       ┃   ┃ ┃   ┃ ┃ ┃ ┏━━━ return
push9 0x601e8060093d393df3
#         ┗┻╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍╍ The only important byte that varies.
msize
mstore                      # mem = 000...000 601e8060093d393df3
                            #     = 000...000 spawned constructor payload

# copy the runtime bytecode after the constructor code in mem
codesize                    # cs
returndatasize              # 0 cs
msize                       # 0x20 0 cs
codecopy                    # mem = 000...000 601e8060093d393df3 RUNTIME_BYTECODE


                            # --- stack ---
push1 9                     # 9
codesize                    # cs 9
add                         # cs+9 = CS = total codesize in memory

push1 23                    # 23 CS
returndatasize              # 0 23 CS
dup3                        # CS 0 23 CS

dup3                        # 23 CS 0 23 CS
callvalue                   # v 23 CS 0 23 CS
create                      # addr1 0 23 CS
pop                         # 0 23 CS

create                      # addr2

selfdestruct